src/glx/dri2_glx.c

   1 /*
   2  * Copyright © 2008 Red Hat, Inc.
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Soft-
   6  * ware"), to deal in the Software without restriction, including without
   7  * limitation the rights to use, copy, modify, merge, publish, distribute,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, provided that the above copyright
  10  * notice(s) and this permission notice appear in all copies of the Soft-
  11  * ware and that both the above copyright notice(s) and this permission
  12  * notice appear in supporting documentation.
  13  *
  14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  15  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABIL-
  16  * ITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY
  17  * RIGHTS. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR HOLDERS INCLUDED IN
  18  * THIS NOTICE BE LIABLE FOR ANY CLAIM, OR ANY SPECIAL INDIRECT OR CONSE-
  19  * QUENTIAL DAMAGES, OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
  20  * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
  21  * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFOR-
  22  * MANCE OF THIS SOFTWARE.
  23  *
  24  * Except as contained in this notice, the name of a copyright holder shall
  25  * not be used in advertising or otherwise to promote the sale, use or
  26  * other dealings in this Software without prior written authorization of
  27  * the copyright holder.
  28  *
  29  * Authors:
  30  *   Kristian Høgsberg (krh@redhat.com)
  31  */
  32
  33 #ifdef GLX_DIRECT_RENDERING
  34
  35 #include <X11/Xlib.h>
  36 #include <X11/extensions/Xfixes.h>
  37 #include <X11/extensions/Xdamage.h>
  38 #include "glapi.h"
  39 #include "glxclient.h"
  40 #include <X11/extensions/dri2proto.h>
  41 #include "xf86dri.h"
  42 #include <dlfcn.h>
  43 #include <fcntl.h>
  44 #include <unistd.h>
  45 #include <sys/types.h>
  46 #include <sys/mman.h>
  47 #include "xf86drm.h"
  48 #include "dri2.h"
  49 #include "dri_common.h"
  50 #include "../../mesa/drivers/dri/common/dri_util.h"
  51
  52 #undef DRI2_MINOR
  53 #define DRI2_MINOR 1
  54
  55 typedef struct __GLXDRIdisplayPrivateRec __GLXDRIdisplayPrivate;
  56 typedef struct __GLXDRIcontextPrivateRec __GLXDRIcontextPrivate;
  57 typedef struct __GLXDRIdrawablePrivateRec __GLXDRIdrawablePrivate;
  58
  59 struct __GLXDRIdisplayPrivateRec
  60 {
  61    __GLXDRIdisplay base;
  62
  63    /*
  64     ** XFree86-DRI version information
  65     */
  66    int driMajor;
  67    int driMinor;
  68    int driPatch;
  69    int swapAvailable;
  70    int invalidateAvailable;
  71 };
  72
  73 struct __GLXDRIcontextPrivateRec
  74 {
  75    __GLXDRIcontext base;
  76    __DRIcontext *driContext;
  77    __GLXscreenConfigs *psc;
  78 };
  79
  80 struct __GLXDRIdrawablePrivateRec
  81 {
  82    __GLXDRIdrawable base;
  83    __DRIbuffer buffers[5];
  84    int bufferCount;
  85    int width, height;
  86    int have_back;
  87    int have_fake_front;
  88    int swap_interval;
  89 };
  90
  91 static void dri2WaitX(__GLXDRIdrawable * pdraw);
  92
  93 static void
  94 dri2DestroyContext(__GLXDRIcontext * context,
  95                    __GLXscreenConfigs * psc, Display * dpy)
  96 {
  97    __GLXDRIcontextPrivate *pcp = (__GLXDRIcontextPrivate *) context;
  98    const __DRIcoreExtension *core = pcp->psc->core;
  99
 100    (*core->destroyContext) (pcp->driContext);
 101
 102    Xfree(pcp);
 103 }
 104
 105 static Bool
 106 dri2BindContext(__GLXDRIcontext * context,
 107                 __GLXDRIdrawable * draw, __GLXDRIdrawable * read)
 108 {
 109    __GLXDRIcontextPrivate *pcp = (__GLXDRIcontextPrivate *) context;
 110    const __DRIcoreExtension *core = pcp->psc->core;
 111
 112    return (*core->bindContext) (pcp->driContext,
 113                                 draw->driDrawable, read->driDrawable);
 114 }
 115
 116 static void
 117 dri2UnbindContext(__GLXDRIcontext * context)
 118 {
 119    __GLXDRIcontextPrivate *pcp = (__GLXDRIcontextPrivate *) context;
 120    const __DRIcoreExtension *core = pcp->psc->core;
 121
 122    (*core->unbindContext) (pcp->driContext);
 123 }
 124
 125 static __GLXDRIcontext *
 126 dri2CreateContext(__GLXscreenConfigs * psc,
 127                   const __GLcontextModes * mode,
 128                   GLXContext gc, GLXContext shareList, int renderType)
 129 {
 130    __GLXDRIcontextPrivate *pcp, *pcp_shared;
 131    __GLXDRIconfigPrivate *config = (__GLXDRIconfigPrivate *) mode;
 132    __DRIcontext *shared = NULL;
 133
 134    if (shareList) {
 135       pcp_shared = (__GLXDRIcontextPrivate *) shareList->driContext;
 136       shared = pcp_shared->driContext;
 137    }
 138
 139    pcp = Xmalloc(sizeof *pcp);
 140    if (pcp == NULL)
 141       return NULL;
 142
 143    pcp->psc = psc;
 144    pcp->driContext =
 145       (*psc->dri2->createNewContext) (psc->__driScreen,
 146                                       config->driConfig, shared, pcp);
 147    gc->__driContext = pcp->driContext;
 148
 149    if (pcp->driContext == NULL) {
 150       Xfree(pcp);
 151       return NULL;
 152    }
 153
 154    pcp->base.destroyContext = dri2DestroyContext;
 155    pcp->base.bindContext = dri2BindContext;
 156    pcp->base.unbindContext = dri2UnbindContext;
 157
 158    return &pcp->base;
 159 }
 160
 161 static void
 162 dri2DestroyDrawable(__GLXDRIdrawable * pdraw)
 163 {
 164    const __DRIcoreExtension *core = pdraw->psc->core;
 165
 166    (*core->destroyDrawable) (pdraw->driDrawable);
 167    DRI2DestroyDrawable(pdraw->psc->dpy, pdraw->xDrawable);
 168    Xfree(pdraw);
 169 }
 170
 171 static __GLXDRIdrawable *
 172 dri2CreateDrawable(__GLXscreenConfigs * psc,
 173                    XID xDrawable,
 174                    GLXDrawable drawable, const __GLcontextModes * modes)
 175 {
 176    __GLXDRIdrawablePrivate *pdraw;
 177    __GLXDRIconfigPrivate *config = (__GLXDRIconfigPrivate *) modes;
 178
 179    pdraw = Xmalloc(sizeof(*pdraw));
 180    if (!pdraw)
 181       return NULL;
 182
 183    pdraw->base.destroyDrawable = dri2DestroyDrawable;
 184    pdraw->base.xDrawable = xDrawable;
 185    pdraw->base.drawable = drawable;
 186    pdraw->base.psc = psc;
 187    pdraw->bufferCount = 0;
 188
 189    DRI2CreateDrawable(psc->dpy, xDrawable);
 190
 191    /* Create a new drawable */
 192    pdraw->base.driDrawable =
 193       (*psc->dri2->createNewDrawable) (psc->__driScreen,
 194                                        config->driConfig, pdraw);
 195
 196    if (!pdraw->base.driDrawable) {
 197       DRI2DestroyDrawable(psc->dpy, xDrawable);
 198       Xfree(pdraw);
 199       return NULL;
 200    }
 201
 202    return &pdraw->base;
 203 }
 204
 205 #ifdef X_DRI2GetMSC
 206
 207 static int
 208 dri2DrawableGetMSC(__GLXscreenConfigs *psc, __GLXDRIdrawable *pdraw,
 209                    int64_t *ust, int64_t *msc, int64_t *sbc)
 210 {
 211    return DRI2GetMSC(psc->dpy, pdraw->xDrawable, ust, msc, sbc);
 212 }
 213
 214 #endif
 215
 216
 217 #ifdef X_DRI2WaitMSC
 218
 219 static int
 220 dri2WaitForMSC(__GLXDRIdrawable *pdraw, int64_t target_msc, int64_t divisor,
 221                int64_t remainder, int64_t *ust, int64_t *msc, int64_t *sbc)
 222 {
 223    return DRI2WaitMSC(pdraw->psc->dpy, pdraw->xDrawable, target_msc, divisor,
 224                       remainder, ust, msc, sbc);
 225 }
 226
 227 static int
 228 dri2WaitForSBC(__GLXDRIdrawable *pdraw, int64_t target_sbc, int64_t *ust,
 229                int64_t *msc, int64_t *sbc)
 230 {
 231    return DRI2WaitSBC(pdraw->psc->dpy, pdraw->xDrawable, target_sbc, ust, msc,
 232                       sbc);
 233 }
 234
 235 #endif /* X_DRI2WaitMSC */
 236
 237 static void
 238 dri2CopySubBuffer(__GLXDRIdrawable *pdraw, int x, int y, int width, int height)
 239 {
 240    __GLXDRIdrawablePrivate *priv = (__GLXDRIdrawablePrivate *) pdraw;
 241    XRectangle xrect;
 242    XserverRegion region;
 243
 244    /* Check we have the right attachments */
 245    if (!priv->have_back)
 246       return;
 247
 248    xrect.x = x;
 249    xrect.y = priv->height - y - height;
 250    xrect.width = width;
 251    xrect.height = height;
 252
 253 #ifdef __DRI2_FLUSH
 254    if (pdraw->psc->f)
 255       (*pdraw->psc->f->flush) (pdraw->driDrawable);
 256 #endif
 257
 258    region = XFixesCreateRegion(pdraw->psc->dpy, &xrect, 1);
 259    /* should get a fence ID back from here at some point */
 260    DRI2CopyRegion(pdraw->psc->dpy, pdraw->xDrawable, region,
 261                   DRI2BufferFrontLeft, DRI2BufferBackLeft);
 262    XFixesDestroyRegion(pdraw->psc->dpy, region);
 263
 264    /* Refresh the fake front (if present) after we just damaged the real
 265     * front.
 266     */
 267    dri2WaitX(pdraw);
 268 }
 269
 270 static void
 271 dri2WaitX(__GLXDRIdrawable *pdraw)
 272 {
 273    __GLXDRIdrawablePrivate *priv = (__GLXDRIdrawablePrivate *) pdraw;
 274    XRectangle xrect;
 275    XserverRegion region;
 276
 277    /* Check we have the right attachments */
 278    if (!priv->have_fake_front)
 279       return;
 280
 281    xrect.x = 0;
 282    xrect.y = 0;
 283    xrect.width = priv->width;
 284    xrect.height = priv->height;
 285
 286 #ifdef __DRI2_FLUSH
 287    if (pdraw->psc->f)
 288       (*pdraw->psc->f->flush) (pdraw->driDrawable);
 289 #endif
 290
 291    region = XFixesCreateRegion(pdraw->psc->dpy, &xrect, 1);
 292    DRI2CopyRegion(pdraw->psc->dpy, pdraw->xDrawable, region,
 293                   DRI2BufferFakeFrontLeft, DRI2BufferFrontLeft);
 294    XFixesDestroyRegion(pdraw->psc->dpy, region);
 295 }
 296
 297 static void
 298 dri2WaitGL(__GLXDRIdrawable * pdraw)
 299 {
 300    __GLXDRIdrawablePrivate *priv = (__GLXDRIdrawablePrivate *) pdraw;
 301    XRectangle xrect;
 302    XserverRegion region;
 303
 304    if (!priv->have_fake_front)
 305       return;
 306
 307    xrect.x = 0;
 308    xrect.y = 0;
 309    xrect.width = priv->width;
 310    xrect.height = priv->height;
 311
 312 #ifdef __DRI2_FLUSH
 313    if (pdraw->psc->f)
 314       (*pdraw->psc->f->flush) (pdraw->driDrawable);
 315 #endif
 316
 317    region = XFixesCreateRegion(pdraw->psc->dpy, &xrect, 1);
 318    DRI2CopyRegion(pdraw->psc->dpy, pdraw->xDrawable, region,
 319                   DRI2BufferFrontLeft, DRI2BufferFakeFrontLeft);
 320    XFixesDestroyRegion(pdraw->psc->dpy, region);
 321 }
 322
 323 static void
 324 dri2FlushFrontBuffer(__DRIdrawable *driDrawable, void *loaderPrivate)
 325 {
 326    __GLXDRIdrawablePrivate *pdraw = loaderPrivate;
 327    __GLXdisplayPrivate *priv = __glXInitialize(pdraw->base.psc->dpy);
 328    __GLXDRIdisplayPrivate *pdp = (__GLXDRIdisplayPrivate *)priv->dri2Display;
 329
 330    /* Old servers don't send invalidate events */
 331    if (!pdp->invalidateAvailable)
 332        dri2InvalidateBuffers(priv->dpy, pdraw->base.xDrawable);
 333
 334    dri2WaitGL(loaderPrivate);
 335 }
 336
 337
 338 static void
 339 dri2DestroyScreen(__GLXscreenConfigs * psc)
 340 {
 341    /* Free the direct rendering per screen data */
 342    (*psc->core->destroyScreen) (psc->__driScreen);
 343    close(psc->fd);
 344    psc->__driScreen = NULL;
 345 }
 346
 347 /**
 348  * Process list of buffer received from the server
 349  *
 350  * Processes the list of buffers received in a reply from the server to either
 351  * \c DRI2GetBuffers or \c DRI2GetBuffersWithFormat.
 352  */
 353 static void
 354 process_buffers(__GLXDRIdrawablePrivate * pdraw, DRI2Buffer * buffers,
 355                 unsigned count)
 356 {
 357    int i;
 358
 359    pdraw->bufferCount = count;
 360    pdraw->have_fake_front = 0;
 361    pdraw->have_back = 0;
 362
 363    /* This assumes the DRI2 buffer attachment tokens matches the
 364     * __DRIbuffer tokens. */
 365    for (i = 0; i < count; i++) {
 366       pdraw->buffers[i].attachment = buffers[i].attachment;
 367       pdraw->buffers[i].name = buffers[i].name;
 368       pdraw->buffers[i].pitch = buffers[i].pitch;
 369       pdraw->buffers[i].cpp = buffers[i].cpp;
 370       pdraw->buffers[i].flags = buffers[i].flags;
 371       if (pdraw->buffers[i].attachment == __DRI_BUFFER_FAKE_FRONT_LEFT)
 372          pdraw->have_fake_front = 1;
 373       if (pdraw->buffers[i].attachment == __DRI_BUFFER_BACK_LEFT)
 374          pdraw->have_back = 1;
 375    }
 376
 377 }
 378
 379 static int64_t
 380 dri2SwapBuffers(__GLXDRIdrawable *pdraw, int64_t target_msc, int64_t divisor,
 381                 int64_t remainder)
 382 {
 383     __GLXDRIdrawablePrivate *priv = (__GLXDRIdrawablePrivate *) pdraw;
 384     __GLXdisplayPrivate *dpyPriv = __glXInitialize(priv->base.psc->dpy);
 385     __GLXDRIdisplayPrivate *pdp =
 386         (__GLXDRIdisplayPrivate *)dpyPriv->dri2Display;
 387     int64_t ret;
 388
 389 #ifdef __DRI2_FLUSH
 390     if (pdraw->psc->f)
 391         (*pdraw->psc->f->flush)(pdraw->driDrawable);
 392 #endif
 393
 394     /* Old servers don't send invalidate events */
 395     if (!pdp->invalidateAvailable)
 396        dri2InvalidateBuffers(dpyPriv->dpy, pdraw->xDrawable);
 397
 398     /* Old servers can't handle swapbuffers */
 399     if (!pdp->swapAvailable) {
 400        dri2CopySubBuffer(pdraw, 0, 0, priv->width, priv->height);
 401        return 0;
 402     }
 403
 404 #ifdef X_DRI2SwapBuffers
 405     DRI2SwapBuffers(pdraw->psc->dpy, pdraw->xDrawable, target_msc, divisor,
 406                     remainder, &ret);
 407 #endif
 408
 409     return ret;
 410 }
 411
 412 static __DRIbuffer *
 413 dri2GetBuffers(__DRIdrawable * driDrawable,
 414                int *width, int *height,
 415                unsigned int *attachments, int count,
 416                int *out_count, void *loaderPrivate)
 417 {
 418    __GLXDRIdrawablePrivate *pdraw = loaderPrivate;
 419    DRI2Buffer *buffers;
 420
 421    buffers = DRI2GetBuffers(pdraw->base.psc->dpy, pdraw->base.xDrawable,
 422                             width, height, attachments, count, out_count);
 423    if (buffers == NULL)
 424       return NULL;
 425
 426    pdraw->width = *width;
 427    pdraw->height = *height;
 428    process_buffers(pdraw, buffers, *out_count);
 429
 430    Xfree(buffers);
 431
 432    return pdraw->buffers;
 433 }
 434
 435 static __DRIbuffer *
 436 dri2GetBuffersWithFormat(__DRIdrawable * driDrawable,
 437                          int *width, int *height,
 438                          unsigned int *attachments, int count,
 439                          int *out_count, void *loaderPrivate)
 440 {
 441    __GLXDRIdrawablePrivate *pdraw = loaderPrivate;
 442    DRI2Buffer *buffers;
 443
 444    buffers = DRI2GetBuffersWithFormat(pdraw->base.psc->dpy,
 445                                       pdraw->base.xDrawable,
 446                                       width, height, attachments,
 447                                       count, out_count);
 448    if (buffers == NULL)
 449       return NULL;
 450
 451    pdraw->width = *width;
 452    pdraw->height = *height;
 453    process_buffers(pdraw, buffers, *out_count);
 454
 455    Xfree(buffers);
 456
 457    return pdraw->buffers;
 458 }
 459
 460 #ifdef X_DRI2SwapInterval
 461
 462 static void
 463 dri2SetSwapInterval(__GLXDRIdrawable *pdraw, int interval)
 464 {
 465    __GLXDRIdrawablePrivate *priv =  (__GLXDRIdrawablePrivate *) pdraw;
 466
 467    DRI2SwapInterval(priv->base.psc->dpy, pdraw->xDrawable, interval);
 468    priv->swap_interval = interval;
 469 }
 470
 471 static unsigned int
 472 dri2GetSwapInterval(__GLXDRIdrawable *pdraw)
 473 {
 474    __GLXDRIdrawablePrivate *priv =  (__GLXDRIdrawablePrivate *) pdraw;
 475
 476   return priv->swap_interval;
 477 }
 478
 479 #endif /* X_DRI2SwapInterval */
 480
 481 static const __DRIdri2LoaderExtension dri2LoaderExtension = {
 482    {__DRI_DRI2_LOADER, __DRI_DRI2_LOADER_VERSION},
 483    dri2GetBuffers,
 484    dri2FlushFrontBuffer,
 485    dri2GetBuffersWithFormat,
 486 };
 487
 488 static const __DRIdri2LoaderExtension dri2LoaderExtension_old = {
 489    {__DRI_DRI2_LOADER, __DRI_DRI2_LOADER_VERSION},
 490    dri2GetBuffers,
 491    dri2FlushFrontBuffer,
 492    NULL,
 493 };
 494
 495 static const __DRIextension *loader_extensions[] = {
 496    &dri2LoaderExtension.base,
 497    &systemTimeExtension.base,
 498    NULL
 499 };
 500
 501 static const __DRIextension *loader_extensions_old[] = {
 502    &dri2LoaderExtension_old.base,
 503    &systemTimeExtension.base,
 504    NULL
 505 };
 506
 507 _X_HIDDEN void
 508 dri2InvalidateBuffers(Display *dpy, XID drawable)
 509 {
 510    __GLXDRIdrawable *pdraw = GetGLXDRIDrawable(dpy, drawable, NULL);
 511
 512 #if __DRI2_FLUSH_VERSION >= 3
 513    if (pdraw && pdraw->psc->f)
 514        pdraw->psc->f->invalidate(pdraw->driDrawable);
 515 #endif
 516 }
 517
 518 static __GLXDRIscreen *
 519 dri2CreateScreen(__GLXscreenConfigs * psc, int screen,
 520                  __GLXdisplayPrivate * priv)
 521 {
 522    const __DRIconfig **driver_configs;
 523    const __DRIextension **extensions;
 524    const __GLXDRIdisplayPrivate *const pdp = (__GLXDRIdisplayPrivate *)
 525       priv->dri2Display;
 526    __GLXDRIscreen *psp;
 527    char *driverName, *deviceName;
 528    drm_magic_t magic;
 529    int i;
 530
 531    psp = Xmalloc(sizeof *psp);
 532    if (psp == NULL)
 533       return NULL;
 534
 535    if (!DRI2Connect(psc->dpy, RootWindow(psc->dpy, screen),
 536                     &driverName, &deviceName)) {
 537       XFree(psp);
 538       return NULL;
 539    }
 540
 541    psc->driver = driOpenDriver(driverName);
 542    if (psc->driver == NULL) {
 543       ErrorMessageF("driver pointer missing\n");
 544       goto handle_error;
 545    }
 546
 547    extensions = dlsym(psc->driver, __DRI_DRIVER_EXTENSIONS);
 548    if (extensions == NULL) {
 549       ErrorMessageF("driver exports no extensions (%s)\n", dlerror());
 550       goto handle_error;
 551    }
 552
 553    for (i = 0; extensions[i]; i++) {
 554       if (strcmp(extensions[i]->name, __DRI_CORE) == 0)
 555          psc->core = (__DRIcoreExtension *) extensions[i];
 556       if (strcmp(extensions[i]->name, __DRI_DRI2) == 0)
 557          psc->dri2 = (__DRIdri2Extension *) extensions[i];
 558    }
 559
 560    if (psc->core == NULL || psc->dri2 == NULL) {
 561       ErrorMessageF("core dri or dri2 extension not found\n");
 562       goto handle_error;
 563    }
 564
 565    psc->fd = open(deviceName, O_RDWR);
 566    if (psc->fd < 0) {
 567       ErrorMessageF("failed to open drm device: %s\n", strerror(errno));
 568       goto handle_error;
 569    }
 570
 571    if (drmGetMagic(psc->fd, &magic)) {
 572       ErrorMessageF("failed to get magic\n");
 573       goto handle_error;
 574    }
 575
 576    if (!DRI2Authenticate(psc->dpy, RootWindow(psc->dpy, screen), magic)) {
 577       ErrorMessageF("failed to authenticate magic %d\n", magic);
 578       goto handle_error;
 579    }
 580
 581    /* If the server does not support the protocol for
 582     * DRI2GetBuffersWithFormat, don't supply that interface to the driver.
 583     */
 584    psc->__driScreen =
 585       psc->dri2->createNewScreen(screen, psc->fd, ((pdp->driMinor < 1)
 586                                                    ? loader_extensions_old
 587                                                    : loader_extensions),
 588                                  &driver_configs, psc);
 589
 590    if (psc->__driScreen == NULL) {
 591       ErrorMessageF("failed to create dri screen\n");
 592       goto handle_error;
 593    }
 594
 595    driBindCommonExtensions(psc);
 596    dri2BindExtensions(psc);
 597
 598    psc->configs = driConvertConfigs(psc->core, psc->configs, driver_configs);
 599    psc->visuals = driConvertConfigs(psc->core, psc->visuals, driver_configs);
 600
 601    psc->driver_configs = driver_configs;
 602
 603    psp->destroyScreen = dri2DestroyScreen;
 604    psp->createContext = dri2CreateContext;
 605    psp->createDrawable = dri2CreateDrawable;
 606    psp->swapBuffers = dri2SwapBuffers;
 607    psp->waitGL = dri2WaitGL;
 608    psp->waitX = dri2WaitX;
 609    psp->getDrawableMSC = NULL;
 610    psp->waitForMSC = NULL;
 611    psp->waitForSBC = NULL;
 612    psp->setSwapInterval = NULL;
 613    psp->getSwapInterval = NULL;
 614
 615    if (pdp->driMinor >= 2) {
 616 #ifdef X_DRI2GetMSC
 617       psp->getDrawableMSC = dri2DrawableGetMSC;
 618 #endif
 619 #ifdef X_DRI2WaitMSC
 620       psp->waitForMSC = dri2WaitForMSC;
 621       psp->waitForSBC = dri2WaitForSBC;
 622 #endif
 623 #ifdef X_DRI2SwapInterval
 624       psp->setSwapInterval = dri2SetSwapInterval;
 625       psp->getSwapInterval = dri2GetSwapInterval;
 626 #endif
 627 #if defined(X_DRI2GetMSC) && defined(X_DRI2WaitMSC) && defined(X_DRI2SwapInterval)
 628       __glXEnableDirectExtension(psc, "GLX_OML_sync_control");
 629 #endif
 630    }
 631
 632    /* DRI2 suports SubBuffer through DRI2CopyRegion, so it's always
 633     * available.*/
 634    psp->copySubBuffer = dri2CopySubBuffer;
 635    __glXEnableDirectExtension(psc, "GLX_MESA_copy_sub_buffer");
 636
 637    Xfree(driverName);
 638    Xfree(deviceName);
 639
 640    return psp;
 641
 642 handle_error:
 643    Xfree(driverName);
 644    Xfree(deviceName);
 645    XFree(psp);
 646
 647    /* FIXME: clean up here */
 648
 649    return NULL;
 650 }
 651
 652 /* Called from __glXFreeDisplayPrivate.
 653  */
 654 static void
 655 dri2DestroyDisplay(__GLXDRIdisplay * dpy)
 656 {
 657    Xfree(dpy);
 658 }
 659
 660 /*
 661  * Allocate, initialize and return a __DRIdisplayPrivate object.
 662  * This is called from __glXInitialize() when we are given a new
 663  * display pointer.
 664  */
 665 _X_HIDDEN __GLXDRIdisplay *
 666 dri2CreateDisplay(Display * dpy)
 667 {
 668    __GLXDRIdisplayPrivate *pdp;
 669    int eventBase, errorBase;
 670
 671    if (!DRI2QueryExtension(dpy, &eventBase, &errorBase))
 672       return NULL;
 673
 674    pdp = Xmalloc(sizeof *pdp);
 675    if (pdp == NULL)
 676       return NULL;
 677
 678    if (!DRI2QueryVersion(dpy, &pdp->driMajor, &pdp->driMinor)) {
 679       Xfree(pdp);
 680       return NULL;
 681    }
 682
 683    pdp->driPatch = 0;
 684    pdp->swapAvailable = (pdp->driMinor >= 2);
 685    pdp->invalidateAvailable = (pdp->driMinor >= 3);
 686
 687    pdp->base.destroyDisplay = dri2DestroyDisplay;
 688    pdp->base.createScreen = dri2CreateScreen;
 689
 690    return &pdp->base;
 691 }
 692
 693 #endif /* GLX_DIRECT_RENDERING */